Also I am noticing that if I have marked subtasks as completed, but left the parent task uncompleted, and also have the show recently completed tasks on, I loose the ability to toggle the subtasks. But if I add a new subtask to the parent task it brings them back.

I think we found the bug and have fixed it from happening. What was happening was that if a parent task had no uncompleted subtasks, it was being converted into an ordinary task without subtasks.

This will no longer happen in the future, but we were unable to retroactively undo any parents that became untoggleable because of this bug. If you have one of these orphaned parents, you can fix it by adding a dummy task to the parent (as you already figured out). Adding a dummy task forces it to reconnect with all its lost completed subtasks. You can then get rid of the dummy task.

Thanks for reporting this bug. Sorry for any inconvenience that this may have caused.

They way you could find out is to look at your completed tasks and look for the icon that indicates that it is a subtask. Click this icon, and if it doesn't load the parent in its place, then the parent has become disconnected from this subtask. Adding a dummy task to the parent, will reattach it.

Since it only affects completed tasks, its probably not worth worrying about unless you often need to refer back to completed subtasks and be able to quickly locate their parent.

OK -- I tried this, by doing a Search for all Completed Tasks. I clicked on the "subtask" icon, and the parent icon WAS loaded in place ... but none of the parent's subtasks exist, even though I'm looking in the view of all Completed Tasks!

It's not terribly important to me, but if there's more bugginess around, I am happy to help you figure it out...

Nah, that's not it, I have a Pro Plus. I can see them in my completed tasks and they have a different icon that looks like it might indicate that they were a sub task. I can also see other completed tasks in my views, so I don't have "hide completed tasks turned" on.